Radium Engineering NPT Round Internal Hex Plug
Not sure which option fits your application? Contact Us — we're happy to help.
Radium Engineering NPT Round Internal Hex Plug - Universal
Radium Engineering produces precision motorsport hardware trusted by builders worldwide, and these NPT Round Internal Hex Plugs are a prime example of that attention to detail. CNC-machined from billet aluminium, they offer a clean, low-profile solution for sealing unused NPT ports without the bulk of a standard hex head plug.
This listing covers the Radium Engineering NPT Round Internal Hex Plug, available in two sizes: 1/8" NPT (SKU: 14-0172) and 3/8" NPT (SKU: 14-0173). Suits any component with a standard NPT port, including catch cans, intake manifolds, and turbo oil drain bungs.
Important: NPT threads seal via tapered thread interference. Always apply PTFE paste or tape before installation and tighten finger tight, then an additional 1.5 to 3 turns.
Key Features
- CNC-machined billet aluminium construction
- Round internal hex design for a clean, compact appearance
- NPT tapered threads for reliable, leak-free sealing
- Available in 1/8" NPT and 3/8" NPT sizes
- Universal fitment across any standard NPT port application
Part numbers, sizing options, and application notes are provided in the tabs above. Confirm your required NPT port size before ordering.
Not sure if this suits your build? Contact our team at sales@chicaneaustralia.com.au for expert advice.
Vehicle Compatibility
Universal fitment — verify dimensions before ordering.
No instructions available for this product.

Need Help Finding the Right Part?
We’ll Track It Down for You
We know how frustrating it can be searching for the right part. If it’s not listed on our site, that doesn’t mean we can’t source it.
Fill out the quick form below and our team will track it down for you.

